1,2,4-Trichlorobenzene
Northwest Grayson County Water Control and Improvement District 1
1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | N/A | 0 | 0 | N/A |
2015 | ND | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 5 | 0 | ND |
2019 | ND | 3 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 5 ppb
The EWG Health Guideline of 5 ppb for 1,2,4-trichlorobenzene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against hormone disruption.
EPA Maximum Contaminant
Level (MCL) 70 ppb
The legal limit for 1,2,4-trichlorobenzene, established in 1992, was based on a toxicity study in laboratory animals conducted in 1981. This limit may not fully protect against hormone disruption.
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2015-07-22 | Q1528461002 | ND |
2015-07-22 | Q1528461003 | ND |
2016-11-03 | Q1647470001 | ND |
2016-11-03 | Q1647470007 | ND |
2017-11-14 | Q1758443009 | ND |
2017-11-14 | Q1758443006 | ND |
2017-12-12 | Q1765385003 | ND |
2018-02-21 | Q1807299003 | ND |
2018-05-29 | Q1821406001 | ND |
2018-09-10 | Q1835971002 | ND |
2018-11-19 | Q1847248001 | ND |
2018-11-19 | Q1847248009 | ND |
2019-03-06 | Q1909735005 | ND |
2019-03-06 | Q1909735007 | ND |
2019-03-06 | Q1909735002 | ND |